One scenario in a fanfiction could be that Tony is wrongly accused of something within the NCIS team. He feels betrayed by his colleagues whom he considered family. This accusation could be something like leaking information or being involved in a case in an improper way. The stress and the sense of betrayal could lead to him breaking down and crying as he tries to defend himself and figure out who is behind the false accusations.
In fanfiction, Tony crying might be a way to explore his more vulnerable side. Often in the show, he is seen as the charming and somewhat cocky agent. But fanfiction writers might want to dig deeper into his character and show that he has insecurities and emotions that he doesn't always show on the surface. It could be related to his family issues, perhaps something from his past with his father resurfacing.
One common theme is loss. Maybe he loses a close friend within the NCIS team, like if McGee were to be seriously injured or killed on a mission. Another theme could be unrequited love. For instance, if he has feelings for Ziva but she doesn't return them in the way he hopes, it could lead to a moment of crying.
He might offer her a warm embrace. Physical contact can be very reassuring in such situations.
Maybe she had a bad memory from her past resurface. For example, something related to her time in Mossad or her family issues could have triggered her emotions.
One possible fanfiction plot could be that Tony sacrifices himself to save a fellow agent. In the story, he might be on a dangerous mission where the enemy has the upper hand. Instead of letting his teammate get killed, he jumps in front of a bullet or takes on a dangerous task that ultimately costs him his life. His death could then have a profound impact on the other characters, leading to a series of events where they struggle to come to terms with their loss and also find a way to honor his memory.
Perhaps in the fanfiction, Tony is injured in a car accident on his way to an important case. The injury is severe enough to put him in a coma. The team at NCIS is left to piece together what happened while waiting for him to wake up. They might find out that the accident was no accident at all, but a targeted attempt on Tony's life by a criminal he had previously put behind bars.
Well, in the context of NCIS fanfiction involving Tony and Ada, it could be that the writer is exploring a romantic angle between them. However, this might be a deviation from the normal character dynamics in the show. Fanfiction often takes creative liberties to create new and exciting storylines. For example, they might be paired up on a dangerous undercover mission that leads to a deeper connection.
In this fanfiction, their child might face some unique challenges. Maybe there are people who try to target the child because of who the parents are. Or perhaps the child has to deal with the pressure of living up to the reputations of Tony and Ziva. It could be an interesting story of how the child overcomes these difficulties with the support of their family and the NCIS family.
Another aspect that fanfictions might cover is their future after marriage. Maybe they'll have kids and how they'll balance their family life with their important work in NCIS. It's interesting to see how different authors imagine their married life, from the small domestic moments to the big adventures they might have together.
There could be many interesting scenarios in such a fanfiction. Maybe they initially struggle to balance their NCIS work with raising a child. For example, they might have to take turns staying home with the baby when a big case comes up. Tony could be the fun - loving dad who plays silly games with the baby, while Kate is the more practical one, making sure the baby has a proper routine.
One possible fanfiction could be a scenario where Tony is kidnapped and the kidnappers tape - gag him to keep him quiet. His team then has to search for him using their skills and knowledge of his habits. For example, they might remember a place he mentioned wanting to visit, and that could be where he's being held.